Motor-drive for calculating-machines.



F. M. CARROLL. MOTOR DRIVE r03 CALCULATING MACHINES.

APPLIOATIOE FILED APR: 20, 1908. Patented Dec 1 10 SHEETS-SHEET l.

Fig. l.

Wlhnasaes {men tort mgml 512 2, Garmll v P. M. CARROLL. MOTOR DRIVE FOB. CALCULATING MACHINES.

APPLICATION FILED APR. 20, 1908. I Patented Dec. 1, 1908.

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Fig.2.

witneasas P. M. CARROLL.

MOTOR DRIVE FOR CALCULATING MACHINES.

905, APPLICATION FILED APR. 20, 1908. Patented Dec. 1,

Wihmssea M omvefisor'; b51225 arm 1 a W m Aht'v's.

r. M. CARROLL. MOTOR DRIVE FOR CALCULATING MACHINES.

- APILIOATION FILED APR. 20, 1908. 905,146. Patented Dec. 1, 1908.

10 SHEETS-SHEET 4.

H v E W-ihnessea inventor. X W Frad vM. Carroll I. M: GARROLLJ MOTOR DRIVE FOR CALCULATING "MACHINES.

APPLIOATIOL FILED AER. 20, 1908.

905,146. v l atented Dec. 1, 1908.

10 SHEETS-SHEET 5.

F. M. CARROLL. MOTOR'DEIVE FOR CALCULATING MACHINES.

APPLICATION FILED APR. 20, 1908.

Patented Dec. 1, 1908.

10 SHEETS-SHEET (S.

Fig.7.

u u u u P. M. CARROLL.

.MOTOR DRIVE FOR CALCULATING MACHINES.

Patented Dec. 1, 1908.

10 SHEETS-SHEET 7.

APPLICATION FILED APR. 20, 1908.

Fig.8

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QEMKE Maw P. M. CARROLL.

I MOTOR DRIVE FOR CALCULATING MACHINES.

APPLICATION FILED APR. 20, 1908.

Patented Dec. 1, 1908.

10 SHEETSSHEET 8.

W'shnasaas 0 lnvleln'hof'. Fwd M awe o mw. 3 M Y Atlz'gs.

F. M. CARROLL. MOTOR DRIVE FOR CALCULATING MACHINES.

I APPLICATION FILED APR. 20 1908. 905,146.

Mk8 N Witnesses inventor:

Patents e0.1,1908. 10 E TSSHBET10.

FRED M. CARROLL, OF NEW HAVEN,

-MACHINE COMPANY, OF NEW CUT.

CONNECTICUT, ASSIGNOR TO CONNECTICUT COMPUTING HAVEN, CONNECTICUT, A CORPORATION OF CONYECTL I MOTOR-DRIVE FOR CALCULATING-MACHINES.

Specification of Letters Patent.

Patented. Dec. 1, 1908-.

Application filed April 20, 1908. Serial No. 428,190.

To all whom it may concern:

Be it known that I, FRED MERCHANT GAR- RoLL, a citizen of the United States, residing at New Haven, Connecticut, have invented a certain new and useful Improvement in M- tor- Drives for Calculating Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side elevational view,- partly in section, of a motor drive for computing machines constructed in accordance with my invention; Fig. 2 is a rear elevational view, partly in section; Fig. '3 is a detail vertical sectional view illustrating the valve and piston for actuating the computing machine;

approximately on the line 4-4 of Fig. 3; Figs. 5 to 10 inclusive are diagrammatical views showing the piston and valves in various positions; F igfill is a horizontal sectional view taken through the ports (Z and 32, the valves being in the position shown in Fig. 5, and the ports a which are located above the aforesaid ports being shown by dot and dash lines; and Fig. 12 is a vertical sectional view illustrating the pump for actuating the valves and piston.

This invention relates to new and useful improvements in motor drives forcomputing machines.

this device applied to the computing machine shown in Patent No. 789,409, issued to me May S), 1905, but I wish it .to be understood that this invention may be used in connection with various types of computing machines, its use in no way being limited to the particular machine shown in said patent. I have herein shown only a portion of the aforesaid computing machine, and refer to said prior patent for a complete description The obj ects of my present invention a re, first. to construct a device of the character described which will, when operated, promptly apply sufficient force to cause the computing ina- 5Q chine to make a complete stroke and then stop (a complete stroke being equivalent to the forward and backward movement of the operating handle) second, to cause-the com- Fig. l is ahorizoiital sectional view taken The accompanying drawings illustrate i l i I l l when the key, which controls the driving mechanism, is held down; third, to provide means whereby should any part of the comto the various locks and counter-locks in the mechanism of a computing machine, which looks are provided to prevent error-sin theoperation of the machine, an operator will find that when he sets up an example on the key-board of the machine and starts to pull the handle (in a handle-operated machine), the handle is locked against movement due to some maladjustment or n'ialposition of the parts. The error key may then be operated to clear themachine, restoring the parts to normal position, and when the example is again set up in the machine. the handle may be operated because all of the parts are in proper position. This is merely an illustrai ion of the utility of my'prcsent invention in connection with the fourth object above set forth. lVhen an example is set up in the machine and the mechanism is locked against movement, the depression of the controlling key for the driving mechanism will only result in part of the driving mechanism making an idle movement without injury to the machine, this idle movement eventually resetting the parts of the driving mechanism in readiness for another operation. The op erator can, after such idle movement, oper ate the error key or do whatever is necessary to unlock the machine. after which. when the control key of the driving mechanism is op cratcd, the driving mechanism is operated and the driving mechanism drives the com puting machine in theintended manner.

Briefly stated, the operation of my improved driving mechanism is as follows: A rotary pump or some device for causing the flow of liquid, preferably oil, is driven by a puting machine to make a number of strokes motor, such motor and pump running continuously. In this manner the liquid is forced through various passages and ports and the piston may be constantly operated when proper instrumentalities are actuated There is a fluid actuated valve for control ling the movements of the piston, said fluid actuated valve being primarily under the direct control-of the operator, who by pressing an appropriate key or lever may initially release the said valve, which will cause the piston to make its proper stroke, the valve being returned to normal position at the end of.

said stroke. There is in addition to the fluid actuated valve an auxiliary, valve under the control of a tappet, whose position is controlled by the piston. This auxiliary valve works in harmony with the main valve but is prevented from making a full stroke when the piston releases the tappet in its rising movement. Should the piston for any reason be prevented from rising after the release .of the main 'valve, the tappet will be held to one side out of the way Of the auxiliary valve, and in-this manner the auxiliary valve is permitted to make a full stroke, necessary to insure the return'of the main valve toits normal position. It might be said that the main valve in ordinaryoperations is dependent upon the piston for its return, but under abnormal conditions, when.

the main valve is released and drops, the

piston does not rise, the movement of the auxiliary valve controls the pressures admitted to the main valve, and said main valve is restored to normal position indedependently of any movement of the piston. In this manner, notwithstanding that parts of the machine maybe locked, no possible injury can happen thereto or to the driving mechanism on account of any interference with the movement of the piston. It is of. course understood that the fluid pressure under the piston to raise said piston is sufficient to drivethe calculating machine, but

. that when the piston is resisted at the release of the main valve the movement of the auxiliary valve permits the ma1n'avalve to make itsusual stroke andreturn to normal position, thu s relieving the pressure under the piston. The computing machine is, of course, provided with a spring or springs which cooperate with the operating valve to return the same to normal position, but if .desired the piston could be so connected to saidonerating shaft as to return the same ma ofmal posit on.

While I have shown in the accompanying drawingsa'chamber' in which the liquid is contained, it is obvious that my invention' broadly considered. contemplates the utilization of fluid and that gases as well as liquids might be used for operating'the piston. These gases or liquids either receive their pressures from a circulating medium, ,in which event their pressures would be variable and dependent upon the power which drives the means for causing such circulation, or said gases or liquids might be stored are subjected tov in a reservoir where they constant pressure.

Referring to Fig. 1 of. the drawings,

102 is the key frame of the computing ma-v clnne, said frame being indicated by 'the samereference character in my prior patent No. 789,409 1, 2 and 3 indicate keys which" constitute a part ofthe key-board of the computing machine. An operating key '4 which controls the mechanism for actuating the computingmachine is slidingly mounted in key frames 102, the lower end of said operating key being in engagement with one end of a bell crank lever-5. Bell crank lever 5 {1S pivoted at 5 toa table 6 which supports the computing machine. A trigger. 7

1s pivoted at 8 and connected to the bell crank 5 by means of a rod or bar 8*. 9 indicates a spring which tends to keep the trigger 7 against a stop 10, as shown in Fig. 1.

When the parts are in this position a tooth 11 on trigger 7 is located under a collar 12 on'the end of a valve stem 13, which latter is connected to a valve A. B indicates a piston provided with a stem 14 which carries an arm 15. This arm 15 has a 'bifur:

cated end which is adapted to cooperate with.

a pin 18 at its upper end which is located in a recess in the underside of an arm 19, the

latter being secured to the operating shaft- 23 of the computing machine. (This shaft .23 is indicated by the same reference character in the patent referred to above.) It

will be readily understood that if piston B rises, arm 19 will be moved to the position shown by dotted lines in Fig. 1, and if said piston is then moved downwardly, arm 19 will follow, the energy for the return movement of said arm being derived from a electric motor 245. An inlet port 25 connects 12, spring 21, which is connected to an arm 189, 1 the latter being secured to shaft 23. If deto a passage Z),

the pump chamber to a passage E, and a. discharge port 26 leads from said chamber see Figs. 2 and 4.

y referring to Fig. 12 it will be seen that if liquid is allowed to enter the pump chamber at 25 it will flow into pockets formed by the space between the gear teeth, and if the gears are rotated in the direction indicated by the arrows said liquid will. be

carried around the periphery of the pump chamber and discharged into the port 26 when the gear teeth come into mesh adjacent.

said port.

The piston B, valve A and auxiliary valve C are mounted in a housing which is preferably built up of sections, as shown in Fig. 4, and are connected together by means of various passages and ports which will be hereinafter described. This housing is arranged within a liquid-tight case 2?, and immersed in a liquid which is pumped through the parts and discharged again into the case. Case 27 forms the support for all the parts contained in it, and both it and the motor are secured to, the underside of the computing machine table. The function of valve A is similar to the-slide valve of an engine or steam pump. opening and closing the ports and passages as will be described hereinafter. .The action of piston 13 and valve A under normal conditions resembles those of an ordinary steam pump, except that.arm 15 does not carry valve A to its restingplace. either upon the upward or downward stroke. but carries it. to a point where certain ports are open. allowing the pressure of the liquid to finish carrying valve A to its stop at either end. Auxiliary valve C does not have any duty to perform when piston B and valve A are doing their regular work. The functions of auxiliary valve C are to relieve and reset valve A, if the computing machine should become locked and prevent piston B from rising. auxiliary valve C is only needed in the emergency described. the mechanism is so adjusted as to cause auxiliary valve C to be inefl'ective when piston B rises to perform its work. i

The valve and piston action will be described as follows, reference being had to Figs. 5 to 10 inclusive, which are diagrammatic views illustrating said parts in various positions:

Position 0 rcsfi-Referring to Fig. 5, the device occupies what might be termed its normal position, in a state o1 rest, with piston B completely down, and valve A in a midway position. being under low pressure tending to force it down. but being held up by trigger 7. The passage of fluid when in this position is as follows: Fluid being dis charged from the pump into 0 passes tl'n'ough passage Z) to port a, thence through slot in piston B to port (Z, then by passage to port 32, through the chamber of valve C, then out port 31, and by passage to ports e which open into valve chamber D, from whence there is no escape; all outlets being closed so that pressure is set up tending to push the valve A down, and it will do so if trigger '7 is tripped. At the same time fluid is free to pass from a through passage f and enter valve chamber at leaving valve chamber at h, thence by passage to i, where it enters piston chamber F, filling this and creating pressure within it tending to hold the piston down to its lowest position. Fluid is discharged from the piston chamber F into the case 27 through an exhaust port 39 which communicates with a pipe 51 leading into the case, as shown in Figs. 2 and 4. The size of port 35) is such that liquid is discharged under low pressure, that is, the cross-sectional area 39 is such that it will not discharge the output of pump without maintaining a pressure of say ten pounds per square inch in the piston and valve chamhers.

.tSfartng.Referring to Fig. 6, it will be seen that trigger 7 has been tripped by means of the starting key on the keyboard. This tripping leaves the valve A free to move downwardly under low pressure. During the downward travel of valve A the first thing that occurs is the closing of port g, preventing the passage of fluid from g to /2, and thus the escape from low pressure exhaust 39, so the leakage mentioned above is stopped and the pressure immediately rises to say one hundred pounds per square inch. Valve A continues down under this high pressure, being permitted to do so because exhaust passagesj to 35 to 36, 3G to is, through slot in piston to Z to 'm, and m to discharge E are open. \Vhen the valve A is down as shown, an exhaust port at a is open and fluid is free to pass from the upper part of piston chamber F through i to 0, then in the direction of the arrow 22, thence out discharge E, which is done when the piston rises. At 7') a portis open that will permit fluid to pass from a to 72 to 1', (it cannot escape at s) to t, and under the piston into chamber G, and this will cause the piston to rise and fluid will continue to be supplied, the device being so adjusted that a desired stroke for the piston will be obtained.

Actuating mrmizriuc.The movement of the parts during the time represented between the positions in Figs. and 7 is as follows: Piston is moved up under high pressure until it reaches a certain point, which we will assume is about one-eighth inch from th'e'end of its stroke, where, by means of an arm 15 on the piston B and collar 12 on valve A, the piston B takes hold of valve A and carries A up with B for about one-sixteenth of an inch to the posicharge E, so that both will continue up-unports 0 and '1; will be connected, thus-allow, 5' ing 'fiuid'to pas's' fromathrough passage 6 toe and o and to u, thence, into'chamber'H, under valve A, causing it 'to rise at about the same speed as piston B, the exhaust passing from w to X through slot 46 in the piston to Z, Z to m and thence "out through distil the piston B comes to its stop (still under pressure), and then valve A will still continue movingup until it comes to stop 15 againstthe'sleeve 4:1 shown Fig. 3, the fTupward movement of the piston B being limited by'a'sleeve 41 shown in Fig. 3.

' Auxiliary bale; inefiectioe. 1n Fig. 7 it will be seen that the auxiliary valve G has risen.- This is due to the pressure under pis ton B being transmitted through the passage Z to 38, and thence into auxiliary valve chamber I, under valve C, causing it to rise. As shown inFig. 5, the pin 16 is so engaged with an inclined face on the upper end of dog 43 that-if auxiliary valve 0 were to rise nothing would prevent its upward movement, but asshown in Fig. 7, when the piston B rose, pin 16' Went with 'it, allowing the spring 445 to act on the dog,43,. which took the position jshown, and formed a stop for the auxiliary valve 0, allowing it to move only partially up; It must be noted that thispartial moVement of valve C does not affect the passages in any way, that is, the passages opened or closed by the auxiliary valve C are exactl the same in Fig. 5 as in Fig.- 7'. The spee of the'upward movement of the auxiliary valve C isregulated. in relation to the speed of pistonfB by the size of the openings 37 and 38, the design preferably being to have the piston B 'rise faster than valve C, so that there will be no question about the pin 16 moving away before the valve C could pass the lower end of the d0g43.- y W Starting d0'wnward.Fig. 8 shows both valve A and piston B in their extreme 'upward positions. When valve A is in this position the passage is open at g, permitting fluid from a to pass through f to g toh to i and into chamber F, tending to force the piston B down. T This is the next thing that occurs as exhaust is open from t to S, in the direction of the arrows, thence to discharge E, so'piston' B is free to move down, which it e. fluid also passesfrom athrough to 0 to y to 37 into chamber K salve C, which, forces valve 0 Fig 0 to Z toS 'in' the direction of the arrows, and

. thence to discharge E.

Return to 1'est.Fig. 9 shows the piston B y to c to o, to u, where it-has no outlet except 130 's'hjo'wn, the exhaust passing from 38 on its downward stroke in a positionabout one-sixteenth of an inch from the extreme end of the stroke, afterit has carried the valve A down far enough so that ports 6 are open, permitting fluid from a to pass through her D and continue the downward movement of. valve A. (after piston B has come to its stop) until collar 12, on val ve A, stops on the trigger 7, then we would have conditions exactlythe same as in- Fig. 5 with all the parts at rest. If the trigger were again tripped we would have a repetition of the foregoing action.

Repeating-If trigger 7 were held out of engagement with the collar 12 on valve A, this action would be repeated over and over again, that is, valve A in coming down as in Fig. 9 could not stop on the trigger, but would continue on down as in Fig. 6, giving a constant reciprocating motion to piston B, once, twice, or as often as desired.

Emergency act2'0n.When the trigger 7 is tripped and valve A descends, as in Fig. 6, if the mechanism of the computing machine is locked an excessive load is placed on piston B and it is prevented from rising as it does in Fig. 7, and in this event valve-A will be re-set on the trigger in the following manner: Of course, if, piston B cannot rise neither can the pin 16, so the dog remains out of the path of auxiliary valve C; then when auxiliary valve C comes up as in Fig. 7, instead on up to the position shown in Fig. 10, and in doing so closes one set of passages, which communicate with the auxiliary valve chamber and opens another, andthen instead of Fig. 6, thepressure orees it up as in Fig, 10, that is, the'liquid flows from a to b to 34, through auxiliary valve'chamberto 33 (this being closed in Figs. 5 toj9), then. by the passage to L and into chamberH, iving a pressure tending to'lift the valve being W to 29, and 29 to 30 (29 to 30 being closed in Figs. 5 to 9), 30'to k and k to Z to m and thence to discharge E. By this method valve A is raised to the position shown in Fig. 9, where pressure holding up the auxiliary valve C is shut off at p and 1', and pressure to force it down isopened at g to h, to 0 to 3 to 37 to.K,'then-auxiliary valve C is forced down to the same position as shown inFig. 5, and the action-of fiuid is again the same asis Fig. 5. This will be repeated as long as the piston B is prevented from rising, and

the operating key-is depressed.

v, In Fig. 3 the valve A is shown in its lower- "the Way up, at a'point where ports a and o are just being connected, by slot 40, in piston B, allowing fluid to pass from a through Z) Z) to c to d to 32 13031 to e, thence intochamthe pressure holding valve A down, as in permitted to do so by exhausting through.

of stopping against the dog 43 it continues most position, and the piston B is shown on 11T In order preferably :50 shaft, a fluid-actuated valve by leakage. If this leakage should occur fluid would escape into the chamber under valve A, and cause a premature rise of valve, which would reverse the direction of the piston B before it had reached its upper stop. To avoid this reversal a channel 47 is cut in valve A, as shown in Figs. 3 and 4t, and any leakage at u is conveyed (by means of this channel) into the case 27. This channel is so arranged that when the ports occupy the positions shown in Fig. 7 the channel has just been closed, allowing no further escape from valve chamber. hen valve X is lifted from its lowermost position by fluid pressure, the supply of fluid is so great and he pressure so high that leakage through the channel in valve A is not noticeable.

The port 48, as shown in the diagrammatical views, communicates with passage 6 and leads to a pipe 49 (see Figs. 2 and 4), which provided with an adjustable relief valve 50. The function of this relief valve is to allow the pump to force the liquid directly into the case 27 when, through any cause whatever, pressure tends to rise above normal, thus avoiding injury to any of the mechanism. The port 39 communicates with a pipe 51 which forms a conduit leading into the case 27.' 52 indicates an adjusting screw (see Figs. 2 and 3) for the purpose of varying the size of the low pressure outlet 39. This adjusting screw enables the low pressure described inreferring to Fig. 5 to be regulated to whatever is desired. An adjustmg screw 53 (see 2, 3 and i)- is adapted to choke off the passage leading from t to s, and is for the purpose of regulating the speed of piston B on its downward. stroke.

to manufacture this device economically it wilLbg necessary to form openings which must be closed later on. The

method of stopping off these openings is by means of threaded plugs which, to avoid confusion, are not shown in the drawings.

Having thus described the invention, what is claimed as new and desired to be secured by LettersPatent is:

In a computing machine, the combina-.

tion with a he board, anoperating shaft, :1 fluid actuated shaft, a fluid-actuated valve for controlling said piston, and a key arranged in said keyboard for rendering the fluid-actuated valve operative; substantially as described.

Ql Tn a computing machine, the combination with a key-board, an operating shaft, a fluid actuated piston for operating said for controlling said piston, a key arranged in said keyboard, and means under control of said key and coiiperating with said fluid-actuated valve for holdmg the same in an inoperat-IV B POSI UOH; substantially as described.

piston for operating said 8. In a computing machine, the combination with the key-board and operating shaft, springs for returning said operating shaft to normal position, a fluid-actuated piston for operating said shaft against the action of said springs, a fluid-actuated valve for controlling said piston, and a key arranged in said key-board for controlling said fluidactuated valve substantially as described.

at. The combination with a computing machine, its key-board and its operating shaft. of a liquid chamber in ported communication with the piston chamber, a fluidactuated piston fordriving said operating shaft, means for causing circulation through said. chambers, a fluid-actuated valve for controlling the passage of said liquid through the ported communications, and means convenient to the operator for initially releasing said fluid-actuated valve: substantially as described.

5. The combination with a computing machine, its key-board and its operating shaft, of a casing containing a liquid chamber in ported communication with a piston chamher, a pump for causing the circulation of liquid through said ports, means for driving sald pump, a piston in said piston chamber connected to said operating shaft, a fluidactuated valve for controlling said piston, and means under the control of the operator for initially releasing said fluid-actuated valve; substantially as described.

6. The combination with a computingmachine, its key-board and its operating shaft, of a fluid-actuated piston for controlling said actuating shaft, a valve for controlling the movement of said piston, means under the control of the operator for releasing'said valve and rendering said piston effective, and means under control of said piston for preventing movement thereof when said piston encounters abnormal resistance; substantially as described.

7. The combination with a computing machine, its key-board and its operating shaft, of a fluid-actuated piston for driving said operating shaft, a valve for controlling the movement of said piston, means under control of the operator for rendering said valve and its controlled piston operative, and means cont-rolled by said piston for rendering said piston inoperative and atthe same time insuring full movement of its controlling valve when said piston encounters abnormal resistance; substantially as described.

8. The combination with a computing machine, its keyboard and its operating shaft, of a fluid-actuated piston for controlling said shaft, a valvefor controlling the movement of said iston, means under control of the operator controlled piston operative, and an auxiliary valve under control of said piston whereby when said operating valve or parts driven of i liquid or rendering said valve and its described.

thereby" are locked and the piston is prevented from moving, said auxiliary valve is permitted to move so as to insure a full movement of the main valve and the restoration of said main valve and said auxiliary valve to normal position; substantially as 9. The combination with a computing machine, its keyboard and its operating shaft,

of means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism being adapted to rocksaid oper ating shaft, and means for rendering said mechanism inoperative When the operating Shaft is overloaded; substantially as described 10. The. combination with: a computing machine, its keyboard and its operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism being adapted to rock said operating shaft, and means operated by fluid pressure for rendering said mechanism inoperative When the operating shaft is overloaded; substantially as described.

11. The combination with a computing machine, its keyboardand its operating shaft, of means for placing fluid under presas described.

sure, mechanism actuated by fluid pressure, said mechanism being adapted to'rock said operatlng shaft, and means including a valve operated by fluid pressure for ren-' dering said mechanism inoperative when the operating shaft is overloaded; substantially l2.;The combination with a computing machine, its keyboard Sure, mechanism actuated by fluid pressure, said mechanism being adapted to positively rock said operatin shaft in one direction.

and leave it free to e returned by independent means; substantially as described.

13. The combination with a computing machine, its keyboard and its operating shaft and a re- 'settin spring therefor, of means -'for placing fluid under pressure,

mechanism being adapted to positivelyrock 1s overloaded;

said operating shaft in spring; substantially as lmach ine, ;i'ts fkeyboard and its 0 one direction and leave it free' to be returned by the re-setting described. 14. The combination with a computing machine,'- its' keyboard and its operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism being under control of the operator and adapted to rock said operating shaft, and. means for rendering said mechanism inoperative when the operating shaft substantially as described. 15. The combination with a computing erating er presshaft, of means-for placing fluid un sure, mechanism actuated by fluid pressure,

and its operating shaft, of means for placing fluid under presfiuid pressure, said scams 1 said mechanism being controlled by an op crating key and adapted to rock said operating-shaft, and means for rendering said I mechanism inoperative when the operating shaft is overloaded; substantially as described.

16. The combination with a computing machine, its. keyboard and its operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism being under control of the operator and adapted to positively rock said operating shaft in one direction and leave it free to be returned by independent means; substantially as described. I

17. The combination with a computing machine, its .keyboard and its operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism being controlled by an operating key adapted topositiv'ely rock said operating shaft in one direction and leave it. free to be returned by independent means; substantiallyas described. v

16. The combination with a computing machine, its, keyboard and its operating shaft, of means for placing fluid under pressure, mechanism including a piston actuated by fluid pressure, said mechanism being adapted to rock said operating shaft, and means for rendering said mechanism inoperative .when the operating shaft is overloaded; substantially as' described 19. The combination with a computing machine, its keyboard and its operating 0 shaft, of means for placing fluid under pressure, mechanism including a piston actuated by fluid pressure, said mechanism being adapted to positively rock said operating shaft in one direction and leave it free to be 105 returned by independent means; substantially as described.

20. The combination with a computing machine, its keyboard and its operating shaft; of constantly operating means for 110 placing fluid under pressure, mechanism actuated by fluid pressure, said-mechanism being adapted to rock. said operating shaft, and means for rendering said mechanism inoperative when the operating shaft is over- 115 loaded; substantially as described.

21. The combination with a computing machine, its keyboard and its operating shaft, of coiistantly operating means for placing fiuid under pressure, mechanism 120 actuated by fluid pressure, said mechanism being adapted to positively rock said operating shaft in one direction and leave it free to be returned by independent means; sub stantially as described.

22. The combination with a computing machine, its keyboard and its operating shaft, ofgconstantly operating means for .plaoingffiuidunder pressure, mechanism actuated by fluid pressure, said, mechanism 130 llulttentt being under control of the operator and adapted to rock said operating shaft, and means for rendering said mechanism inoperative when the operating shaft is overloaded; substantially as described.

23. The combination with a computing machine, its keyboard and its operating shaft, of constantly operating means for placing fluid under pressure, mechanism actuated by fluid pressure, said mechanism eing under control of the operator and adapted to positively rock said operating shaft in one direction and leave it free to be returned by independent means; sub stantiallyas described.

21. The combination with a computing machine, its keyboard and its operating shaft, of constantly driven means for plac-' under pressure, ated by fluid pressure, said controlled by mechanism actumechanism being an operating key adapted to positively rock sald operating shaft in one direction and leave it free to be returned by independent means; substantially as described.

25. The combination with shaft, of a constantly operating means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapt ed to rock said operating shaft; substantially as described.

26. The combination with an operating rock shaft, of a constantly driven means for placing fluid under pressure, and intermittently operating mechanism actuated b I fluid pressure, said mechanism being adapted to rock said operating shaft; substantially'as described.

:27. The combination with an operating rock shaft, of a constantly operating means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism including a piston and being adapted to rock said operating shaft; substantially as described.

28. The combination with an operating rock shaft, of a constantly operating means for placing an operating operating mechanism actuated by fluid pressure, said mechanism being under control of the operator and adapted to rock said operating shaft; substantially as described.

29. The combination with an operating rock shaft, of a constantly operating means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being controlled by an operating key and adapted to rock said operating shaft; substantially as described. i;

30. The combinatioifiwith an operating rock shaft, of a constantly operating means forplacing fluid-under. pressure, intermitfluid under pressure, anct'iiiter I tently operating mechanism fluid pressure, said mechanism being adapted to rock said operating shaft, and means I for rendering said means inoperative when the operating shaft is overloaded; substantially as described.

31. The combination with an operating rock shaft, of a constantly operating pump for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapted to rock said operating shaft; substantially as described The combination with an operating shaft, of means for placing fluid under pressure. and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapted to rock said operating shaft: substantially as described.

The combination with an operating rock shaft. of a pump for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapted to rock said operating shaft; substantially as described.

34. The combination with an operating shaft, of means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid anism being under control of the operator and adapted to rock said operating shaft: substantially as described.

35. The combination with an operating shaft, of a constantly operating means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapted to rock said operating shaft in one direction and then leave it free to be returned to normal position by independent means; substantially as described.

36. The combination with an operating rock shaft, of a constantly operating means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism including a valve-controlled piston and being adapted to 'rock said operating shaft; substantially as "described. I 37; The combination with rock shaft, of a constantly for placing fluid under pressure, andintermittently operating mechanism actuated by flui pressure, said mechanism including a valve controlled by an operating key and be ing adapted to rock said operating shaft; substantially as described.

38. The combination with an operating rockshaft, of means for placing fluid under pressure, and intermittently operating mechanism actuated by fluid pressure, said mech anism including a valve controlled by an operating key and being adapted to rock said operating shaft; substantially as described.

39. The combination with an operating actuated by an operating pressure, said mecho1 )erat ing meansrock shaft, of means for placing fluid under pressure, and intermittentlyoperatmg mechanism actuated by fluid ressure, said mechanism being controlled y the operatpr and adapted to rock said operating shaft; substantially as described.

.40. The combination with an operating rock shaft, of means for, placing fluid under. pressure, a piston operated by said means,

connections between the piston and the operating shaft, a valve for controlling said piston, said valve being controlled by an opertttiiigkey, and means for rendering said piston inoperative when theoperating rock shaft is overloaded; substantially as described.

. 41. The combinationwith an operating rockshaft, ofmeansforplacing fluid under pressure, a piston operated by said means,

connections between the pistonand the operating shaft, a valve for controlling said pis ton, said valvebeing controlled by the oper-' ator, and means for rendering'said piston inoperative when the operating rock shaftis overloaded; substantially as described.

' 42. The combination with an operating rock shaft, of means for placing fluid under pressure, a piston operated by saidmeans,

connections between the piston and the operating shaft, a movable valve for controlling said piston, said valve being-controlled by an operating key, and means for rendering said piston inoperative and restoring the valve toits normal-position when the operating rock shaft is overloaded; substantially as described. 1 p

43. The combination with an operating shaft, of a constantly operating means for placing fluidunder pressure, and intermittently operating mechanism actuated by fluid pressure, said mechanism being adapted to actuate said operating shaft; substantially as described.

44. The combination with an operating shaft, of means for placing fluid under pressure, and intermittently operating mechan ism actuated by fluid pressure, said mechanism. being adapted to actuate-said operating shaft; substantially as describedij 45. The combination with an operating shaft, of means for lacing fluid under pres-' i sure,fluid-'controlle ymechanis'nrfor actuating said operating shaft, said. mechanism beng under control of the operator, and means for rendering said mechanism inoperative vwhen the operatingfshaft is overloaded; substantiallyas described. I y I 46. The combination with an o eatin shaft, of means for placin fluidun er pressure, fluid-controlled mec anism for actuatlng sald operating shaft, s'aid mechanism being under controlQof the operator, and means for rendering said means inoperative and restoring it toits normalposition when under low pressure; substantially as described. I

48. The combination with an operating shaft, of means for 'placing fluid under pres-- sure, a fluid-controlled piston for actuating said operating shaft, and means whereby said piston is moved in one direction under comparatively high pressure; substantially as described.

49. The combination with an o crating shaft, of means for placing fluid un er pressurefa fluid-controlled piston for actuating said operating shaft, and means for adjusting the speed of said piston; substantially as describe 50. The combination with an operating shaft, of means for placing fluid under pres-' sure, a fluid-controlled piston for actuating said operating shaft, a valve for controlling said p1ston,.saidvalve being under control of the operator, and means for adjusting the speed of said scribed;

51. .The combination with an operating .shaft, of means for placing fluid under pressure, afluid-controlled piston for actuating 'said operating shaft, and valves for controlling said piston, one of said valves being piston; substantially as 'dev normally ineffective; substantially as described.

52. The combination with an operating shaft, of means for placing fluid under pressure, a fluid-controlled piston for actuating said operating shaft, and valves for control-- ling said piston,.o'ne of saidv valves being overloaded; substantially as described; 53. The combination with an operating shaft, of means for placing fluidunder. pressure, a fluid-controlled piston for actuating 'said' operating shaft, a valve for controlling 7 said piston, said valve and'piston being constantly under pressure, and an operating -key for controlling said valve; substantially as described.

' 54.-The combination with an operating shaft, of means for placing fluid under pressure, a fluid-controlled piston for actuating said operating shaft, a .valve for controlling said' piston, said valve and piston being constantlyunder pressure but normally stationary, and an operating key for controlling said valve, substantially as described.

efi'ective only when the operating shaft is i 55.The combination with aii'o erating' shaft, of means for placing fluid un erpres-' sure, a fiuid-control edpiston for-actuating? said operating shaft, a valve for controlling said piston, said valve being constantly under pressure, and a movable stop for normally holding said valve stationary, said stop being under control of the operator; substantially as described.

56. The combination with an operating shaft, of means for placing fluid under pressure, a fluid-controlled piston for actuating said operating shaft, a valve for controlling said piston, said valve being constantly under pressure, and a movable stop for normally holding said valve stationary, and an operatingkey for releasing said stop; substantially as described.

57. The combination with an operating shaft, of means for placing fluid under pressure, mechanism actuatedby fluid*'pressure cooperating with said means, said mechanism being capable of actuating said operating shaft, and means for causing said mechanism to actuate said operating shaft once and then stop; substantially as described.

58. The combination with an o crating shaft, of means for placing flui under pressure, mechanism actuated .by fluid pressure cooperating with saidmeans, said mechanism. being capable of actuating said operating shaft, and means for causing said mechanism to actuate said operating shaft once and then stop, the last-mentioned means being under control of the operator; substantially as described.

59. The combination with an operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure cooperating with said means, said mechanism being capable of actuating said operating shaft, and means for causing said mechanism to actuate said operating shafta predetermined number of times; substantially as described.

60. The combination of an operating shaft, of means for placing fluid under pressure, mechanism actuated by fluid pressure cooperating with said means, said mechanism beingcapable of actuating said operating shaft, and means for causing said mechanism to actuate said'operating shaft a predetermined number of times, the last-mentioned means being under control of the operator; substantially as described.

61. The combination with an operating shaft, of means for placing fluid under pressu re, mechanism:actuated by fluid pressure ctioperating with said means,"said mechanism being capable of actuating said operating shaft, and means for causing said mechanism tov actuate said operating shaft under comparatively high pressure and return to normal position under comparatively low pressure; substantially as described.

62. In a device of the character described, the combination with a key-board including an operating key, of an operating shaft, means for placing fluid underpressure. fluidt-ontrolled mechanism cooperating with said means. said mechanism being capable of ac tuating said operating shaft and being con- -Il0ll(*(l by said operating key; substantially "as described.

(3?). In a device of the character described,

the combination with a key-board including an operating key, of an operating shaft, constantly operatingmeans for placing fluid under pressure, fluid-controlled mechanism cooperating with said means, said mechanism, being capable of actuating said operating shaft, and being controlled by said operating key; substantially as described.

64. In a device of the character described, the combination with a key-board including an operating key, of an operating shaft, means for placing fluid under pressure, fluidcontrolled mechanism cooperating with said means, said mechanism being capable of actuating said operating shaft and being controlled by said operating key, and means for rendering said mechanism inoperative when the operating shaft is overloaded; substantially as'described.

65. In a device of the character described. the combination with a key-board including an operating key, of an operating shaft, means for placing fluid under pressure, fluid-controlled mechanism cooperating with said meansaisaid mechanism being on able of actuating said operating shaft and eing controlled by said operating key, and means whereby said mechanism is automatically rendered ineffective when the operating shaft is overloaded; substantially as described.

66. In a device of the character described, the combination with a key-board including means for placing fluid under pressure,

fluid-controlled mechanism cooperating with said means, said mechanism includmg a Valve-controlled piston for actuating said operating shaft and being controlled by said operating key substantially as described.

"67. In a device of the character described, the combination with akey-board including an operating key, of an operating shaft,

means for placing fluid under pressure, a

constantly running motor for driving said means, fluid-controlled mechanism cotiperating with said means, said mechanism bein capable of actuating said operating sha and being controlled by said operating key; substantially as described.

68.- In a device of the character described, the combination with a key-board including an operating i key, of an operating shaft, means for placing fluid under pressure, fluidcontrolled mechanism cooperating with said means, said mechanism being capable of an operating key, means for placing fluid under pressure, fluidactuating said operating shaft when the operating key is moved to its abnormal position; substantially as described. i

69. In a device of the character described, the combination with a keyboard including of an operating shaft,

controlled mechanism cooperating Witl. said an operating key, of an operating shaft, means for placing fluid underpressure fluidmeans, said mechanismbeing capable of actuating said operatingshaft continuously when the operating key is held in its abnormal position; substantially as described. In testimony whereof I hereunto afiix my signature in the presence of two Witnesses, this fourteenth day of April 1908. h

FRED M. CARROLL.

Witnesses:

M. E; BEIMLER, L. C. STILLMAN. 

